Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 236 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
4. 4.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
5. 5.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) baking a cake (d) cooking an egg
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
8. 8.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a mirror (c) salt (d) a battery cell
9. 9.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a mirror (d) a piece of string
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) a shallow dish (d) warm water
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) sugar (d) baking soda
13. 13.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a shallow dish (d) turmeric powder
15. 15.🔍 Which is the odd one out? (a) baking soda (b) sand (c) glucose powder (d) sugar
16. 16.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) browning lemon ink (d) milk turning to curd
17. 17.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
18. 18.True or false: baking soda dissolves in water. (a) False (b) True
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
21. 21.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
24. 24.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) dissolving salt (d) browning lemon ink
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
26. 26.True or false: food colour dissolves in water. (a) False (b) True
27. 27.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
28. 28.True or false: melting butter is a change that cannot be undone. (a) True (b) False
29. 29.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
31. 31.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) cooking an egg (d) melting butter
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) small pebbles (d) sand
34. 34.True or false: sawdust dissolves in water. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) sand (d) baking soda
36. 36.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
37. 37.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
38. 38.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a shallow dish (d) a magnet
39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
40. 40.True or false: freezing water is a change that cannot be undone. (a) True (b) False

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